US2801375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon semiconductor devices and processes for making them
Assignee: Westinghouse Electric Corp
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Filing: 1955-08-01
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Granted: 1957-07-30
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Expires: 1975-08-01
Abstract
No abstract record available.
Inventors
- 👤 Ezekiel F Losco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:34
CPC Classifications
H; H10; H10P; H10P95/00; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3006; C; C22; C22C; C22C5/00; H10D; H10D99/00; H10W; H10W70/00; H10W70/20; H10W70/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A SEMICONDUCTOR DEVICE, IN COMBINATION, AND END CONTACT MEMBER COMPRISING A METAL OF THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN AND BASE ALLOYS THEREOF HAVING A COEFFICIENT OF THERMAL EXPANSION CORRESPONDING CLOSELY TO THAT OF SILICON, A WATER OF SILICON HAVING ONE SURFACE CONFORMING TO A SURFACE OF THE END CONTACT MEMBER, THE TWO SURFACES BEING IN JUXTAPOSITION, AND A SOLDER DISPOSED BETWEEN AND BONDING THE SILICON WATER TO THE END CONTACT MEMBER, THE SOLDER COMPRISING A SILVER ALLOY COMPOSED OF FROM 0.5% TO 8% BY WEIGHT OF ANTIMONY, AT LEAST 72% BY WEIGHT OF SILVER AND THE BALANCE COMPRIING AT LEAST ONE ELEMENT FROM THE GROUP CONSISTING OF GERMANIUM, SILICON LEAD AND TIN.
Claim 2
Dependent Claim
114 words
IN A SEMICONDUCTOR DEVICE, IN COMBINATION, AND END CONTACT MEMBER COMPRISING A METAL OF THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN AND BASE ALLOYS THEREOF HAVING A COEFFICIENT OF THERMAL EXPANSION CORRESPONDING CLOSELY TO THAT OF SILICON, A WATER OF SILICON HAVING ONE SURFACE CONFORMING TO A SURFACE OF THE END CONTACT MEMBER, THE TWO SURFACES BEING IN JUXTAPOSITION, AND A SOLDER DISPOSED BETWEEN AND BONDING THE SILICON WATER TO THE END CONTACT MEMBER, THE SOLDER COMPRISING A SILVER ALLOY COMPOSED OF FROM 0.5% TO 8% BY WEIGHT OF ANTIMONY, AT LEAST 72% BY WEIGHT OF SILVER AND THE BALANCE COMPRIING AT LEAST ONE ELEMENT FROM THE GROUP CONSISTING OF GERMANIUM, SILICON LEAD AND TIN.
References Cited (Backward Citations)
US2702360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |